The Four Plausible Routes by Which Terrorists Might Use Nuclear

The four plausible routes by which terrorists might use nuclear devices include

A) acquiring radioactive material and using conventional explosive to disperse this material.
B) enriching natural uranium to weapons grade uranium, and building a nuclear weapon from it.
C) obtaining plutonium by the chemical reprocessing of used fuel rods, and building a nuclear weapon from it.
D) All of the above.
E) None of the above.